Accurate HVAC equipment, ductwork, and mechanical piping cost estimates for every Division 23 system for mechanical contractors and GCs across all 50 US states.
Mechanical estimating services help HVAC contractors, mechanical contractors, sheet metal fabricators, piping contractors, general contractors, engineers, and developers accurately calculate material quantities, labor costs, equipment costs, and installation expenses before construction begins. Our experienced mechanical estimators prepare detailed mechanical quantity takeoffs, material takeoffs, and complete mechanical cost estimates for residential, commercial, industrial, healthcare, educational, and mixed-use projects across the United States. We estimate every major CSI Division 23 scope, including HVAC equipment, ductwork, mechanical piping, chillers, boilers, air handling units (AHUs), rooftop units (RTUs), exhaust systems, ventilation, insulation, controls, dampers, diffusers, and mechanical accessories. Using FastDUCT, FastPIPE, PlanSwift, Bluebeam, and current market pricing, every estimate includes accurate quantities, equipment schedules, labor pricing, and detailed cost breakdowns to help contractors reduce estimating errors, submit competitive bids, improve project planning, and complete mechanical projects with confidence.
These are the four mechanical HVAC estimating problems that cost contractors the most on every bid.
Incorrect duct sizing based on pressure class leads to system performance failures, costly re-fabrication, and change orders during commissioning.
HVAC equipment represents 40 to 60% of a mechanical estimate. Missing a chiller, AHU, or VAV terminal from the equipment schedule wrecks margin on any mechanical bid.
Duct insulation, pipe insulation, and building automation and controls can represent 15 to 25% of mechanical scope cost. They are the most commonly missed mechanical estimate items.
HVAC ductwork takeoff is the most labour-intensive trade to estimate manually. Without FastDUCT, a full commercial HVAC takeoff can take days, too long for competitive bid schedules.
DFE Estimating solves all four — precise HVAC estimates using FastDUCT and FastPIPE, with correct duct gauge, insulation, equipment, and controls, delivered before your bid deadline.
A four-step process covering every duct, every piece of equipment, and every inch of mechanical piping in your HVAC scope.
Upload your mechanical HVAC plans, equipment schedules, and specifications through our secure portal. PDF, CAD, and Revit MEP accepted for all mechanical scopes.
Your assigned mechanical estimator identifies the HVAC system type, RTU, AHU, VAV, VRF, or chilled water, confirms duct pressure classes, and reviews the full equipment schedule.
We use FastDUCT for all ductwork, measuring every linear foot by size, gauge, and material per SMACNA standards, and pricing all equipment from the mechanical schedule with current supplier pricing.
You receive a complete Excel mechanical estimate, ductwork by size and gauge, equipment by type and model, piping by diameter and material, insulation, and controls, ready for bid submission.
Nine reasons mechanical HVAC contractors across the USA trust DFE with their Division 23 bids.
Every Division 23 HVAC and mechanical element – precisely measured, correctly specified, and priced to current local market rates.
Complete equipment schedules and pricing for all HVAC equipment types, packaged rooftop units (RTUs), air handling units (AHUs), fan coil units, VAV terminal units, exhaust fans, cooling towers, chillers, and boilers, with current supplier pricing.
Precise ductwork estimates prepared using FastDUCT, measuring every linear foot of supply, return, and exhaust ductwork per SMACNA standards, all fittings by type, duct gauge by pressure class, hangers, dampers, grilles, diffusers, and registers.
Specialist estimates for VRF multi-split and ductless mini-split systems, covering all indoor and outdoor units, refrigerant piping by line set size, electrical connections, controls wiring, and all VRF system accessories.
Complete estimates for chilled water plants and hot water hydronic systems, covering chillers, cooling towers, pumps, piping by diameter and insulation class, expansion tanks, air separators, and all hydronic system accessories.
Detailed mechanical piping estimates for HVAC hydronic piping, refrigerant piping, gas piping, and process piping, covering pipe by diameter and material, fittings, valves, hangers, and insulation using FastPIPE.
Specialist insulation estimates for all mechanical systems, duct insulation by thickness and material, pipe insulation by diameter and insulation class, equipment insulation, and all mechanical FastWRAP insulation quantities per ASHRAE 90.1 requirements.
From a residential HVAC replacement to a complex commercial chilled water plant, DFE estimates every mechanical project nationwide.
Accurate mechanical HVAC estimating backed by 12 years of Division 23 experience and SMACNA-proficient professionals.
Mechanical HVAC estimating
Projects completed
Division 23 specialists
Standard turnaround
HVAC ductwork, Plumbing piping and Mechanical insulation
All duct pressure classes
US Nationwide
Always available
Other services mechanical contractors and GCs frequently combine with mechanical estimating.
All 3 MEP trades together.
Full project cost estimates.
Full commercial cost reports.
Fixture and pipe estimates.
Conduit, wire, panel estimates.
Mechanical estimating is the process of calculating the material, labour, and equipment costs for HVAC and mechanical systems in a construction project under CSI Division 23. It includes quantifying all HVAC equipment — air handling units, rooftop units, fan coil units, chillers, boilers, and cooling towers — plus all ductwork by size and material, mechanical piping, insulation, building automation controls, and all mechanical accessories. Mechanical estimating requires specialist software — primarily FastDUCT for ductwork and FastPIPE for piping — and knowledge of SMACNA standards and ASHRAE requirements.
HVAC costs in the United States vary significantly by system type and building use. Split system and packaged rooftop unit (RTU) installations in small commercial buildings typically cost $10 to $16 per square foot. Variable air volume (VAV) central air systems with air handling units and zone controls range from $18 to $28 per square foot. Chilled water and hot water hydronic systems for large commercial or institutional buildings range from $25 to $35 per square foot. Healthcare facilities with precise temperature and humidity requirements can exceed $40 per square foot. DFE prices all HVAC estimates using current local equipment and labour rates by zip code.
Division 23 is the CSI (Construction Specifications Institute) division covering heating, ventilating, and air conditioning (HVAC) in a construction project. It includes HVAC air distribution — ductwork, diffusers, grilles, and dampers (Division 23 31 00), HVAC piping and hydronic systems (Division 23 21 00), refrigeration systems (Division 23 62 00), central cooling equipment including chillers (Division 23 64 00), central heating equipment including boilers (Division 23 52 00), and building automation and control systems (Division 23 09 00). DFE covers all Division 23 sub-categories in every mechanical estimate.
The main commercial HVAC system types in the United States are: split systems — a separate outdoor condensing unit and indoor air handler, standard for small commercial and residential; packaged rooftop units (RTUs) — self-contained units mounted on the roof serving zones through ductwork, most common in mid-size commercial; VAV (variable air volume) systems — a central AHU delivers conditioned air to VAV terminal units in each zone, standard in large commercial office; VRF (variable refrigerant flow) — refrigerant piped directly to multiple indoor units, increasingly popular in multi-storey commercial; and chilled water systems — a central chiller plant circulates chilled water to AHUs and fan coil units, standard in large commercial and institutional. Each system requires a different estimating approach and has a very different cost profile.
Professional mechanical estimating uses two primary specialist software tools. FastDUCT is the industry standard for HVAC ductwork estimating — it measures duct area by size and shape, calculates fittings by type, applies duct gauge per SMACNA pressure class, and prices all ductwork with current material costs and labour hours. FastPIPE is used for all mechanical piping — measuring pipe lengths by diameter and material, calculating fittings, valves, and hangers, and pricing piping systems. FastWRAP is used for mechanical insulation takeoffs. DFE is proficient in all three FastEST platforms and delivers all mechanical estimates in Excel format organised by CSI Division 23 sub-category.
Mechanical estimating service fees typically range from $250 to $2,000 depending on project size, system complexity, and scope. A residential HVAC estimate for a single system generally starts at $250 to $500. A mid-size commercial HVAC estimate covering RTU systems and ductwork ranges from $500 to $1,200. Complex commercial mechanical estimates covering chilled water plants, VAV systems, and full hydronic systems can exceed $2,000. DFE charges flat fees based on your project scope. Contact us for a free quote within 2 hours of receiving your mechanical drawings.
Ductwork gauge refers to the thickness of the sheet metal used to fabricate HVAC ductwork — the lower the gauge number, the thicker and heavier the steel. SMACNA (Sheet Metal and Air Conditioning Contractors National Association) specifies the required gauge for each duct pressure class: low pressure (up to 1-inch water column static pressure) uses 26 gauge galvanized steel for ducts up to 12 inches wide; medium pressure (up to 2-inch WC) uses 24 gauge; and high pressure (up to 3-inch WC) uses 22 gauge or heavier. Specifying the wrong duct gauge underprices the sheet metal cost significantly — heavier gauge steel costs more per square foot of duct and fabrication labour increases with heavier material. DFE specifies the correct SMACNA duct gauge for every pressure class in every mechanical estimate.
The most common refrigerants in US commercial HVAC systems are currently undergoing a regulatory transition. R-410A has been the dominant commercial refrigerant for the past two decades — used in most split systems, packaged RTUs, and VRF systems currently in service. However, R-410A is being phased down under US EPA regulations due to its high global warming potential. R-32 is a lower-GWP alternative now used in many new VRF and split systems. R-454B (trade name Puron Advance) is being adopted as the primary replacement for R-410A in new US commercial HVAC equipment from 2025 forward. Equipment pricing, refrigerant piping sizing, and service valve specifications differ between refrigerant types — DFE accounts for the current equipment refrigerant in every mechanical estimate.
DFE Estimating is a trusted provider of construction estimating services, delivering accurate quantity takeoffs, material takeoffs, labor pricing, and bid-ready construction estimates for residential, commercial, and industrial projects. We help contractors save time, reduce estimating errors, and bid with confidence.
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